<template>
  <div class="tags">
    <div class="new">
      <button @click="createTag">新增标签</button>
    </div>
    <ul class="current">
      <li v-for="tag in tagList" :key="tag.id"
          :class="{selected:selectedTags.indexOf(tag)>=0}"
      @click="toggle(tag)">{{tag.name}}</li>
    </ul>
  </div>

</template>

<script lang="ts">
import {Component} from 'vue-property-decorator';
import TagHelper from '@/mixins/TagHelper';
import {mixins} from 'vue-class-component';

@Component
  export default class Tags extends mixins(TagHelper) {
    selectedTags: string[] = [];
    get  tagList() {
        return this.$store.state.tagList;
      }
  created() {
      this.$store.commit('fetchTags');
    }
    toggle(tag: string) {
      const index = this.selectedTags.indexOf(tag);
      if (index >= 0){
      this.selectedTags.splice(index,1)
    }else{
      this.selectedTags.push(tag);
    }
    this.$emit('update:value',this.selectedTags)
  }
};
</script>

<style lang="scss" scoped>
.tags {
  background: white;
  font-size: 14px;
  padding: 16px;
  flex-grow: 1;
  display: flex;
  flex-direction: column-reverse;

  > .current {
    display: flex;
    flex-wrap: wrap;

    > li {
      $bg:#d9d9d9;
      background: $bg;
      $h: 24px;
      height: $h;
      line-height: $h;
      border-radius: $h/2;
      padding: 0 16px;
      margin-right: 12px;
      margin-top: 4px;
      &.selected{
        background: darken($bg,50%);
        color: white;
      }
    }
  }

  > .new {
    padding-top: 16px;

    button {
      background: transparent;
      border: none;
      color: #999;
      border-bottom: 1px solid;
      padding: 0 4px;
    }
  }

}

</style>